The electromagnetic transfer of information between two or more points that do not use an electrical conductor as a medium to perform the transfer is known as wireless communication. Radio waves are the most common wireless technology used for wireless communication. It comprises various types of fixed, mobile, and portable applications such as two-way radios, cellular telephones, wireless networking, and personal digital assistants. A wireless network refers to a computer network that uses wireless data connections between network nodes. Some other methods of achieving wireless communication are the use of sound and the use of electromagnetic wireless technologies such as light, magnetic and electric fields. As this field is emerging at a rapid pace, the contents of this book will help the readers understand the modern concepts and applications of the subject. It is a valuable compilation of topics, ranging from the basic to the most complex advancements in the field of wireless communication. This book will provide comprehensive knowledge to the readers.